<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Tennis Court with Moving Point</title>
  <style>
    html, body {
      margin: 0;
      padding: 0;
      height: 100%;
      overflow: hidden;
    }

    canvas {
      display: block;
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
  </style>
</head>
<body>
  <canvas id="canvas"></canvas>
  <script src="main.js"></script>
</body>
</html>
